Linux Security
    Linux Security
    Linux Security

    Debian: 'cfingerd' multiple vulnerabilities

    Date 11 Jul 2001
    Posted By LinuxSecurity Advisories
    Buffer overflow and format string attack vulnerabilities exist in previous versions of cfingerd.
    Debian Security Advisory DSA-066-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.                         Wichert Akkerman
    July 11, 2001
    Package        : cfingerd
    Problem type   : remote exploit
    Debian-specific: no
    Steven van Acker reported on bugtraq that the version of cfingerd (a
    configurable finger daemon) as distributed in Debian GNU/Linux 2.2
    suffers from two problems:
    1. The code that reads configuration files (files in which $ commands are
       expanded) copied its input to a buffer without checking for a buffer
       overflow. When the ALLOW_LINE_PARSING feature is enabled that code
       is used for reading users files as well, so local users could exploit
    2. There also was a printf call in the same routine that did not protect
       against printf format attacks.
    Since ALLOW_LINE_PARSING is enabled in the default /etc/cfingerd.conf
    local users could use this to gain root access.
    This has been fixed in version 1.4.1-1.2, and we recommend that you upgrade
    your cfingerd package immediately.
    wget url
            will fetch the file for you
    dpkg -i file.deb
            will install the referenced file.
    Debian GNU/Linux 2.2 alias potato
      Potato was released for alpha, arm, i386, m68k, powerpc and sparc.
      Source archives:
          MD5 checksum: e1e5ed3fe85f2af5304b9f0d3d236a91
          MD5 checksum: 966e205737bcd43182d01114694ed52a
          MD5 checksum: 0461179bca7bb9b00fb23c0886666cb0
      Alpha architecture:
          MD5 checksum: 9c43dd39460c58ed6a0134333349e2f9
      ARM architecture:
          MD5 checksum: 70da6073d42fbbdd29a025517127ebb0
      Intel IA-32 architecture:
          MD5 checksum: 2281e1aa8dc439680b1df546a5139aae
      Motorola 680x0 architecture:
          MD5 checksum: 19bf9fbcf1d2e1d7d38ff5bd00c6dc0a
      PowerPC architecture:
          MD5 checksum: 383389307d0ebd11b3f8a20abe1395a9
      Sun Sparc architecture:
          MD5 checksum: 1e734a8573e1c05d8e07ffcc8543c4e9
      These packages will be moved into the stable distribution on its next
    For not yet released architectures please refer to the appropriate
    directory$arch/ .
    apt-get: deb stable/updates main
    dpkg-ftp: dists/stable/updates/main
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.

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